Door-buffer.



F. i. PARISH.

DOOR BUFFER.

APPUCATIGN FILED APR. 27, 1914.

Patented July M)l 19W.

ANTR@ plan FRANK J. PARISH, or BROOKLYN, NEW Your, AssIeNoze To .GRINDEN ART METAL COMPANY, or BiaooiiLYN, NEW YORK, A c oaronATIoN 0F NEW YORK.

DOOR-BUFFER.

Speciatonof Letters'IElatent.

Patented July l0, 1917.

To all whom t may concern:

Be it known that I, FigANig J. .PAmsm a citizen of the United States of America, and residing .in the borough of Brooklyn, in the county oi Kings and State of New York, have invented a certain .new and useful Improvement in Door-Buffers, of .which the following is a specification.

My Ainvention relates te .deer buffers epd particularly te buffers fer ,Sliding doers eueh es are commonly employ-ed 'in' Street eerie, railway2 passenger cars, etc. The object of my invention is to provide .a buer of improved construction incorporating novel features of safety, illustrated by way `of eX- ample in the accompanying yelvrawings, in which, l

Figure ll is a side elevation of portion cfa door having a buffer in which my invention is embodiedin one form;

Fig. 2 is a vertical section ythrough .portion of a buii'er section;

Fig 3 Ais a horizontal section on the line 3*;37 2;

Fig. 4 is a section on the line 4=.4,Fig. 3, partially broken away;

Fig. 5 is a horizontal section through portion of a door `and itsabutinent showing a modified construction; and

Fig. 6 is a vertical elevation of a similar part showing anothermodification.

It has become Customary te provide the sliding doors of passenger cars suchas employed on street railways, subways, .andthe like, with tubular rubber buffers in `order to somewhat yprotect aganstinjury the hands, arms ,or legs of passengers who .have not completely cleared the .door at the moment it is-shut. These doors are commonly operated wthsreet pOW\er,eXertedeither meer ually lthrough lever systems, or Vby motor power through air pressure, ,eletrc motors and the like, ll/Thile a `l`cushioning Abulier of this 4character may save the hand orarm from being broken v,or mashed, it oifers no preeeterl ese-inet the parebees gripped `se tightly that it cannot be .withdrawn and consequently, accidents are `Vnot uncommon which result from'the `persQIl heilig dragged along by the car withjthehand or :alim thus caught bythe door. Still more `frequently yare injuries to clothing which 1s ,thus .caught by the .closing door ,and torn. -'lh. e object of my invention is Atopr,ovid.eV El bller of such character that the hand or other part,

pr eleehir1e`,lee readily pulled free in spree ef the faettha't the fleerliae bee11 Yfully elpeed upon ltlp .perhaps 'ite simplest ferm, my irri/er1- iOn is embodied in a butler vof thisI character, which, in Vthe danger zone, is made in sections ,cachet whiclii is free to yield transversely te the plane ef the .deer and iede- .penelently ef adieeene eeeers te permit [the withdrawal "of a part caught thereby. Thus .in Fis l, 'the `@leer l0 is 'provided er its yerteel Ledge with tubular rubber buffer f1.1 eemprisips' e plurality ef Seeeerle e, e, e, o3, ve and j', llhether each section is fastened independently, by Serewe l2 eeeeei sible .through holes' 13, or 'by a common fastening member, ie mlrleterel- In arly eeee, each 'section is laterally yieldable, through the resiliency of the rubber, to ermit the withdrawal of a limb or garment caueht beiS .Obvious that the Seepepel .Construction 0f the buffer `germits the `much more ready Withdrawal ef the Vpart caught, than 'iS tlee case when the buifer is a one-piece construc- .725 tweenthe `edge of the door and its j amb. It

tion, sincetheffrictional resistance between the buiier and door `jamb which must be overcmeto permit a section to yield is only thatof'the single section which engages the vpart Caught The remaining Sections are Aiinafected .and the withdrawal effort iseX- erted only uponA that particular section the yieldingvof which is Anecessary to free the part caught. ,'lvhus the power 4required for th-is purpose is minimized. A second and @most important eii'ect of this construction lies in the fact 'that since the remaining sections oii'lthe buffer ,are unaffected by the deiieeterl ef e particular eeetem. they remain imposition to Vtaire up the thrust of the closingmotor ,or power. The deflection of a single section thus does not result in a further closing movement of the door under the` influence of the closing power, as would be the 4case were lthe entire buffer deflected. In lthe latter case, the Withdrawal effort 4must be ,exerted `at its maximum until the part caught ie entirely freed, Since with .every partial deflection of the buffer as a y, whole, the closing motor presses the door ,further .shut andthus `maintains the ressureeerreterlt against the part caught ley. the door.. Where e-ens'le Seeeien erll-y ,is delleeted, V,theeifort to :secure the release is not only less, nbut itneeds to be exerted at its maxi- `raised angled edges 33, 34 of the base plate secured against the vertical edge.of the mum only momentarily to overcome the initial frictional resistance to deflection and this resistance is not renewed` after deflection since the thrust of the closing power is taken up by the remaining sections of the buffer which remain in normal position.

Various other ways of securing this action will readily'suggest themselves. In Figs. 2, 3 and 4 I have shown one eflicient construction for the purpose- In this form each buffer section `may comprise a tubular cushion 14 with side wings 1516 overlapping the arched metal supporting frame 17'. The web 18 of the cushion may have nuts 19 embedded therein to receive the screws 20 passing through the base of the rocking lugs 21.` These lugs pass through slots 22 in the crown of the arch frame 17 and pivot on a rod 23 mounted in the standards 24, the base of which is fastened by screws 25 to the frame 17. A coil spring 26 is arranged on the rod 23 between each pair of standards vr24 andthe free ends of the spring engaged with pins 27, 28 carried by blocks 29, 30

door 10. While these sections may be extended from top to bottom of the door, the

danger zone within which the limbs or clothing is apt to be caught, lies below the shoulder. Y Consequently -I prefer to provide the upper section of the door with a stationary buffer cushion of old type and provide these pivoted sections only below this level. This is advantageous for the reason that it facilitates'repair or replacing of a section, since it is only necessary tounscrew and remove the upper section to permit all the lower sections to be slid up and off the base plate 35. Furthermore, it permits these sections'to be lmadevstandard, and only'the upper section f cut to length to t doors of various heights.

, ,A stop36 at the bottom of the base plate, 55..

' down'below the lower edge ofthe door.

prevents the several sections from sliding The operation of these pivoted sections is obvious. .Upon Vdeflection of the buffer 14, it rocks on the rod 23 through the lugs 21. These lugs engage one or the other of the 'pins 27, 28 4depending upon the direcj tion of deflection, Yand thus tension the spring 26,'th'e' other end of which is held stationary' by the engagementfof its 'pin against its 'standard 24. Uponv the release of the section by the freeing of the part caught, the spring returns the section to normal position.

Since the buer may be exposed to weather, it is preferable to have at least the upper end of each section closed as by* aldiaphragm 37 to exclude rain, snow or the li re.

Obviously in this arrangement, as in that first described, the buffer may be arranged in the jamb instead of on the edge of the door, or it may be arranged on both jamb and door.

A third embodiment of my invention is shown in Fig. 5. Here the edge of the door` 10 is provided with a buffer or sectional buffer 33 pivoted at 39 to swing only in the direction of the arrow w. The jamb 40 is provided with another cushion 41 pivoted at 42 to swing only in the direction of the arrow y. The meeting faces of the buffer cushions are preferably beveled to facilitate their ready separation. Springs 43-44 arranged on the pivot pins 39, 42 return the buffers to position after deiiection.

In the construction shown in Fig. 6, the door 10' and the jamb 40 are provided along vtheir meeting edges with sectional rollers 45 mounted on rods 46, resiliently supported on brackets 47. The use of rollers sacrifices some of the cushioning effect of a tubular buffer, but it does permit of the ready freeing of the part caught,'and the cushion effect may be produced by a suitable cushion on the amb.

Various other modifications will readily suggest themselves and I do not limit my invention to the details shown.

I claim as myinvention y1.` A door buffer of sectional structure comprising a rigid base plate common to a plurality of buffer sections and having a stop at its lower end, a plurality o f independent frame sections, in slidable engagement with said base plate and adjusta le thereon from its upper end, together with independent cushion elements carried by the respective frame sections.

2. A door buer of sectional structure comprising a rigid base plate common to a plurality of buffer sections and having a stop Vat its lower end, a plurality of independent frame sections, in slidable engagement` with said base plate and adjustable thereon from its upper end, together with independent cushion elements carried by the respective frame sections, and a fixed section independent of the base plate and adapted to be mounted in position after the removable sections have been attached.

3. A door buffer comprising a plurality of self-contained independent cushion sections and means carried by each cushion section to afford a pivotal support therefor.

4. A door buffer 'comprising a plurality CJD of self-contained independent cushion sections, a frame element for each section adapted to be inflexibly secured to its support, and means carried by each cushion section to afford a pivotal connection with said frame element.

5. A door buffer comprising a plurality of self-contained independent cushion sections, a frame element for each section, a fixed base plate common to said buffer sections and to which said frame elements are adapted to be detachably but infleXibly connected, and means carried by each cushion section to afford a pivotal connection with its corresponding frame element.

6. A door buiier comprising a plurality' of self-contained independent, pivoted cushion sections, a base plate common thereto and means for detachably mounting the sections thereon together with a complementary cushion member mounted in extension of said pivoted sections and serving to re tain the detachable sections on the base plate.

7. A door buffer having a series of pivotally mounted cushion sections yieldable transversely to the plane of the door and a complementary, buffer-completing cushion section yieldable, but without pivotal connection, substantially as described.

8. A door buffer comprising a base plate with raised margins, a sectional buier having a segmental tubular frame the edges of which form a sliding joint with said base plate and a buffer pivoted on said tubular ilrame.

9. A door buffer comprising a base plate with raised margins, a sectional buffer having a segmental tubular frame the edges of which form a sliding joint with said base plate, a Vpivot rod carried by said frame and a butter carrying lugs pivoted on said rod.

l0. A door buer comprising a plurality of tubular cushion members each having its upper end closed against the admission of rain.

ll. A door buffer comprising a supporting frame, and a tubular member pivoted thereon and havingy lateral extensions embracing said frame member.

12. In a door buler, a iXed base plate, a plurality of independent, self-contained buffer sections, each comprising a frame member adapted to engage the base plate, a cushion member and a pivoted engagement between the latter and the frame member permitting the cushion member to swing transversely of the olane of the door.

13. In a door bu er, a Xed base plate, a plurality of independent, selfcontained buffer sections, each comprising a frame member adapted to engage the base plate a cushion member and a pivoted engagement between the latter and a frame member permitting the cushion member to swing transversely of the plane of the door in either direction.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

FRANK J. PARISH.

Witnesses:

WALTER ABBE, L. I-I. GROTE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of atente, Washington, D. C. 

